公开(公告)号：US20180058908A1

公开(公告)日：2018-03-01

申请号：US15557712

申请日：2015-03-27

Applicant: A&D COMPANY, LIMITED

Inventor： Yoshikazu NAGANE ,  Norihiko KUMAGAI

IPC: G01G7/02 ,  G01G21/24 ,  G01G23/01

CPC classification number: G01G7/02 ,  G01G7/04 ,  G01G21/24 ,  G01G23/01 ,  G01G23/012

Abstract: Provided is an electronic balance of electromagnetic force type including a weight automatic loading mechanism which can place and remove a weight by its own mechanism without use of either an external balance weight or a built-in balance weight. An electronic balance of electromagnetic force type is provided with a beam equilibrium setting unit that sets two or more equilibrium states of the beam position detecting unit. By making conversion ratios of upper and lower light receiving circuits nonequivalent, an imaginary weight is generated by utilizing the operating principle of the electromagnetic balance of electromagnetic force type.